Samsung Galaxy Ace S5839i Restore Factory Hard Reset Remove Pattern Lock It will remove all the data ,contacts and apps that you installedSamsung Galaxy Ace S5839i Hard ResetBefore You Start You Should Know That All Data Will Be LostIf You Forgot The Combination To Unlock The Screen Follow These Steps:1.Power Off Your Phone2.Press Together Volume Up + Home Key + Power Button3.Choose With Volume Buttons "wipe Data/factory Reset" And Select It With Home Button4.Choose "yes" With Volume Buttons And Select It With Home Button5.Wait Untill Format Ends6.Choose "reboot"7.Wait Until The Phone Restarts